Spray nozzle



Oct. 21, 1947. c. R. KEEP SPRAY NOZZLE Filed July 7, 1944 I INVENTOR. vCharles R. Keq v. BY 7 91w miorne Patented Oct. 21, 1947 SPRAY NOZZLECharles R. Keep, Norwood, Mass., assignor, by mesne assignments, toWestinghouse Electric Corporation, a corporation of PennsylvaniaApplication July 7, 1944, Serial No. 543,907

4 Claims.

This invention relates to spray nozzles and relates more particularly tospray nozzles of the type disclosed in my Patent No. 2,257,691, whichare adapted to produce large volumes of spray over wide angles and underlow pressures,

The nozzle of my said patent produces a wide angle of spray filled withrelatively coarse droplets as is desired for the spraying of evaporatortubes and the wetting of filters in air washers. The nozzle of thisinvention provides results superior to those of the patent and has theadditional advantages that it may be manufactured and serviced at lessexpense, and in addition may be made of plastic as well as of metal.

Objects of the invention are to provide a spray nozzle which willprovide large spray angles filled with relatively coarse droplets, whichmay be manufactured and serviced at less expense than prior nozzles.

The invention will now be described with reference to the drawing, ofwhich:

Fig. 1 is a front elevation of a spray nozzle embodying this invention;

Fig. 2 is a side elevation of the nozzle of Fig. 1;

Fig. 3 is a sectional view along the lines 3-3 of Fig. 1;

Fig. 4 is a view similar to Fig. 1 but with the end cap removed;

Fig. 5 is a sectional view along the lines 55 of Fig. 3, and

Fig. 6 is a sectional view along the lines 6--6 of Fig. 2.

The nozzle has a hollow, tapered, whirl chamber ill, the outer portionof which is formed by the inner wall of the removable plug or cap II,the inner portion of which is threaded and is screwed into the nozzlearound the chamber ID. The base I2 of the nozzle is internally threadedfor connection to a liquid supply pipe or header and the cylindricalpassage I3 extends from the interior of the base and connectssubstantially tangentially with the whirl chamber III at the centerthereof. 1

The plug I I has the outlet Id connecting with the whirl chamber I anddiverging outwardly therefrom for spraying the liquid received from thenozzle through a relatively wide angle.

The inner nozzle I converges towards the outlet I and has inner andouter Walls formed as surfaces of revolution. The outer end I 6 of thenozzle I5 extends in a vertical plane across the outlet of the passageI3 and divides the liquid passing therefrom into the whirl chamber Ininto two streams, one of which after spinning around the curved innerwall of the plug II passes directly from the outlet I4, and the other ofwhich passes into the nozzle I5 and is projected from its outlet I'I,centrally into the outlet MintheplugII.

The plate l8 may be attached to the inner nozzle l5 so as to extendacross the inlet to same so as to take the spin out of the liquidentering the inner nozzle. It preferably should have curved edgescomplemental to and contacting the curved Walls of the whirl chamber tothe rear with respect to liquid flow, of the nozzle I5.

The liquid passing from the nozzle I5 has its velocity increased due tothe converging walls with the apparent result that upon being projectedinto the whirling liquid passing directly from the outlet I4, itprovides a, spray more completely filled with coarse spray droplets.

As disclosed in said patent, the outlet ll of the nozzle I5 should havea diameter less than that of the outlet l4 and should be spacedtherefrom a distance not less than the outer diameter of the outlet II.

The inner wall of the nozzle may be recessed as illustrated by Figs. 3and 6, to receive the outer edge of the base of the nozzle I5 which maybe attached thereto when the plu II is removed, as by soldering orbrazing if the nozzle is of metal, or by cementing if the nozzle is ofplastic material.

In operation, the nozzle l5 projects a cone shaped spray of relativelycoarse droplets into the center of the wider angled cone of sprayresulting from the liquid leaving the whirl chamber I0 and passingdirectly from the outlet I4, the overall result of the two sprays beinga wide angle cone completely filled with coarse droplets.

In operation, the liquid leaving the whirl chamber I ll and passingdirectly therefrom through the outlet [4 provides a wide angle cone ofspray which without the use of the inner nozzle l5 would not be filledwith coarse spray droplets as is desired. The nozzle I5 projects a highvelocity jet into the water passing through the outlet I4 and reactswith it providing a wide angled cone completely filled with relativelylarge spray droplets.

While one embodiment of the invention has been described for the purposeof illustration, it should be understood that the invention is notlimited to the exact disclosure, since modifications thereof may besuggested by those skilled in the art, without departure from theessence of the invention.

What is claimed is:

1. A spray nozzle having an inner whirl cham her with a wall convergedat the opposite ends thereof, said wall having an outwardly divergingoutlet formed therein, said nozzle having a liquid supply passage with awall connecting substantially tangentially with a wall of said chamberwhereby the liquid entering said chamber is given a spin, and meansforming an inner nozzle in said whirl chamber, said means beingpositioned to extend crosswise of the whirl chamber and to form apartition across said passage for dividing the flow therefrom into twostreams, one into said diverging nozzle and the other into said innernozzle, said inner nozzle having an outlet aligned axially with saidoutlet and spaced therefrom.

2. A spray nozzle having an inner whirl chamber with a wall converged atthe opposite ends thereof, said, wall having an outwardly divergingoutlet formed therein, said nozzle having a liquid supply passage witha, wall connecting substantially tangentially with a wall of saidchamber whereby the liquid entering said :chamber'is given a spin, andmeans forming an inner nozzle in said whirl chamber and extendingcrosswise same, and

dividing the flow therefrom into two streams, one into said divergingoutlet and the other into said inner nozzle, said inner nozzle having anoutlet aligned axially with said first mentioned outlet and spacedtherefrom, said converging wall being removable for insertion of saidinner nozzle.

i, A spray nozzle having an inner whirl chamber with a wall converged atthe opposite ends thereof, said wall having an outwardly divergingoutlet formed therein, said nozzle having a liquid supply passage with awall connecting substantially tangentially with a wall of said chamberwhereby the liquid entering said chamber is given a spin, and' neansforming an inner nozzle in said whirl chamber and extending crosswisesame, and

forming a partition across said passage for dividforming a partitionacross-said passage for divid- 'ing the flow therefrom into twostreams,one into said diverging nozzle and the other into said inner nozzle,'sa-id inner nozzle having walls converging towards-saiddiverging outletand having an outlet aligned axially with said iirst mentioned. outletand spaced therefrom,

3. A spray nozzle having an inner whirl chamher with a wall converged atthe opposite ends thereof, said wall having an outwardly divergingoutlet formed therein, said'nozzle having a liquid supplypas'sage withaw all connectingsubstantially tangentially with awa-ll of said chamberh b d a e sai hemb s iven a spin, "and m'eansiorming an inner nozzle inai ifl h mbermq'x eedies ro swise me, and forming a partition acrosssaid passage for ing the flow therefrom into two streams, one into saiddiverging outlet and the other into said inner nozzle, said inner nozzlehaving walls converging towards-said outlet and having an outlet alignedaxially with said first mentioned outlet and spaced therefrom, saidconverging wall being removable for insertion of said inner nozzle.

CHARLES R.

REFERENCES oI- rE "The following references are of record in the file orthis patent:

